waypoint cache fixes


git-svn-id: svn://svn.tuxfamily.org/svnroot/tesseract/main@1798 b412e182-2ed4-4078-95c4-27dc59f57fa9
skip empty wpcaches


git-svn-id: svn://svn.tuxfamily.org/svnroot/tesseract/main@1799 b412e182-2ed4-4078-95c4-27dc59f57fa9
empty wpcache fixes


git-svn-id: svn://svn.tuxfamily.org/svnroot/tesseract/main@1800 b412e182-2ed4-4078-95c4-27dc59f57fa9